$ git clone -n https://src.fedoraproject.org/rpms/netmask.git /var/lib/mock/f41-build-side-1-2649195-27475/root/chroot_tmpdir/scmroot/netmask
Cloning into '/var/lib/mock/f41-build-side-1-2649195-27475/root/chroot_tmpdir/scmroot/netmask'...
$ git fetch origin d2a37151bd2e9a6f63d7194ef59b1a1b21dab778:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/netmask
 * [new ref]         d2a37151bd2e9a6f63d7194ef59b1a1b21dab778 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2a3715 convert GPLv2+ license to SPDX